EP0255472A2 - Brûleur à gaz - Google Patents

Brûleur à gaz Download PDF

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Publication number
EP0255472A2
EP0255472A2 EP87730086A EP87730086A EP0255472A2 EP 0255472 A2 EP0255472 A2 EP 0255472A2 EP 87730086 A EP87730086 A EP 87730086A EP 87730086 A EP87730086 A EP 87730086A EP 0255472 A2 EP0255472 A2 EP 0255472A2
Authority
EP
European Patent Office
Prior art keywords
gas
gas burner
burner according
mixture
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP87730086A
Other languages
German (de)
English (en)
Other versions
EP0255472A3 (en
EP0255472B1 (fr
Inventor
Kurt Pelzer
Horst Reichmann
Wolfgang Henche
Winfried Uckelmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaillant BV
Original Assignee
Vaillant Austria GmbH
Vaillant NV
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Schonewelle BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27421257&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0255472(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from AT202386A external-priority patent/AT393018B/de
Priority claimed from DE19868631542 external-priority patent/DE8631542U1/de
Priority claimed from AT53287A external-priority patent/AT388793B/de
Priority claimed from AT188987A external-priority patent/AT391189B/de
Application filed by Vaillant Austria GmbH, Vaillant NV, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, Schonewelle BV filed Critical Vaillant Austria GmbH
Publication of EP0255472A2 publication Critical patent/EP0255472A2/fr
Publication of EP0255472A3 publication Critical patent/EP0255472A3/de
Application granted granted Critical
Publication of EP0255472B1 publication Critical patent/EP0255472B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/30—Inverted burners, e.g. for illumination
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit

Definitions

  • the invention relates to a gas burner, in particular a lintel burner, with a burner plate through which outlet openings for a gas-air mixture pass and through which a mixture guide can be fed with such a mixture.
  • the object of the invention is to design such a gas burner from a few, robust and simple components in such a way that it can be easily assembled and dismantled for maintenance purposes and that its components are associated with one another in such a space-saving manner that the gas burner is located in one device, e.g. in the housing of a water heater, can be conveniently accommodated and, due to the sensible assignment of the components, ensures largely pollution-free combustion with high efficiency.
  • this object is achieved in that the burner plate of a gas burner of the type mentioned at the outset is detachably held with a centrally arranged mixture guide in an annular holder enclosing a mixture chamber.
  • Such a holder is advantageously simple in design and opens up the possibility of a particularly uniform distribution of the mixture over the surface of the burner plate through which the mixture outlet openings pass.
  • the mixture guide is radially connected to an air guide, into which a gas supply line with a gas nozzle opens in the opposite direction to the air flow and coaxially.
  • This arrangement ensures a simple manner an optimally intimate mixing of combustion air with the gas, and thus the production of a gas-air mixture which x enables a low-carbon NO combustion.
  • the air duct between a stationary part containing the mouth of the gas supply line and a part movable together with the mixture guide and the burner plate connected to it has a detachable butt joint, then this part that can be moved can be easily removed from the stationary part to service or replace individual components.
  • the object of the invention is also a structurally simple design of the holder of the burner plate, the deformation caused by temperature-related stresses prevents without affecting the peripheral sealing of the edge of the burner plate.
  • the edge of the burner plate can be held in the holder by an outer and / or inner retaining ring.
  • a rotatable clamping ring can be mounted within the annular holder, which rests on the inside of the edge of the burner plate and whose radially outward extensions engage in recesses of a fixed ring fastened in the holder and engage behind parts of this ring.
  • the burner plate can be fastened in its holder with a pretension generated in the direction of the combustion chamber.
  • Another object of the invention is to reduce the pollutant emissions of such a gas burner and to fully utilize the thermal energy generated by such a gas burner.
  • the invention is based on the knowledge that the NO x accumulation can be reduced significantly by cooling the gas-air mixture and by cooling the burner plate.
  • the holder of the burner plate forms at least one cavity carrying a coolant.
  • This solution has the advantage that the coolant, preferably water, is able to cool not only the gas-air mixture in the mixture chamber, but also the burner plate itself, and this fact is due to the fact that the burner plate is comparatively smaller than before can have.
  • the coolant preferably water
  • the air duct 15 of such a gas burner is connected via a coupling to an interchangeable fan 16 of an optimally selectable output, which feeds air to a mixing device for producing a gas-air mixture.
  • the design of the fan 16 must be selected for a basic setting with the optimal air ratio.
  • the blower 16 must have the steepest possible characteristic curve in the range of the required delivery volume, i.e. the delivery volume should remain essentially the same in the widest possible counter pressure range.
  • these should be able to be connected to a conventional chimney as well as to a flue gas duct made of stainless steel without any adjustment to the hygiene values of the basic setting.
  • the gas burners according to FIGS. 1 and 3 have a mixture outlet openings 2 (FIG. 4) which are directed downwards and which have a gas / air mixture through the mixture guide 3 Loadable burner plate 1, which is fastened to a lower end wall 64 of the cylindrical mixture guide 3 by means of a central screw connection 4 and a holding disk 64 ⁇ .
  • This mixture guide 3 has radial recesses 5 at a distance from the end wall 64, via which the mixture flowing from the mixture guide 3 can exit into the mixture chamber 6 enclosed by the holder 7 of the burner plate 1.
  • the height of these recesses 5 should not exceed a certain limit value and the distance of the recesses 5 from the burner plate 1 should not be less than a certain limit value. In general, you can set up the measurement rule, according to which the distance should be at least twice the height.
  • the circular burner plate 1 is held at its edge by the annular holder 7, in this embodiment shown by the horizontal leg of an angularly profiled outer retaining ring 8 according to FIG. 2, which is fastened to the cylindrical wall of the holder 7 by means of fastening elements 9 and Edge of the burner plate 1 sealingly presses against the inward edge flange 37 of the holder 7.
  • the mixture chamber 6 is delimited at the top by an end plate 10, through which the mixture guide 3 passes.
  • the radial recesses 5 of the mouth area of the mixture guide 3 is assigned an annular diaphragm 11 which can be adjusted axially by means of a spindle 12 to adjust the optimum mixture throughput to the size of the To determine the opening cross-section.
  • the ring diaphragm 11 and the spindle 12 are adjusted by means of a threaded nut 13 and a lock nut 14 on the upper, threaded end of the spindle 12 with support against the upper end wall 65 of the mixture guide 3.
  • An air duct 15 is connected radially to the upper region of this mixture duct 3, in which the combustion air conveyed by the blower 16 flows in and is mixed with gas.
  • a gas supply line 17 opens into this air duct 15 coaxially and in the opposite direction to the air flow in a gas nozzle 18 which is exchangeably fastened and coaxially penetrated by a nozzle bore and which is held coaxially in the air duct by a holder 19.
  • This retaining ring 19 forms in the region of the gas nozzle 18 a throttle acting as a baffle plate, which delimits the front part of the air duct 15 from the rear part, which serves as a mixing chamber.
  • the inflowing gas mixes intimately with the combustion air conveyed in countercurrent and this mixture then passes via the mixture guide 3 into the mixture chamber 6 and to the mixture outlet openings 2 of the burner plate 1.
  • This mixture passes via the mixture guide 3 into the mixture chamber 6 and to the mixture outlet openings 2 of the burner plate 1.
  • the part of the air duct 15 running between the retaining ring 19 of the gas nozzle 18 and the mixture guide 3 has, according to FIG. 1, a butt joint 20 formed by flanges extending obliquely to the axis, so that the right part the air duct 15 together with the adjoining mixture duct 3 for maintenance work after loosening the screw connection 4 can be easily removed from the burner plate 1 and from the stationary part of the air duct 15 containing the gas nozzle 18.
  • the gas burner further comprises the burner plate 1, which is penetrated by a plurality of recesses 2 and separates the combustion chamber 24 from the mixture chamber 6 and is fastened and supported centrally on the mixture guide.
  • the same flow rate should occur as possible, in order to prevent the burner plate 1 from kicking back or partially glowing in the case of low air numbers or to partially raise the flames at high air numbers.
  • this burner plate 1 is penetrated by a plurality of sets of mixture outlet openings 2 which run parallel to one another and are divided into groups which are spaced apart from one another.
  • the groups of holes sit within these groups in each case uniform distances and every fifth group of holes is omitted, so that the remaining groups of four thereby have a distance from one another which is twice the uniform distance.
  • the hole pattern of the burner plate 1, like the hole diameter, is important for the emission behavior of the gas burner, for its tendency to kick back or lift off the flames, and for the range of the air ratio.
  • FIG 3 shows an embodiment variant of the gas burner, according to which the gas supply line 17 is guided coaxially to the gas nozzle 18 through an end wall 21 of the air duct 15 and is held axially adjustable in this end wall 21 with a threaded sleeve 22.
  • cylindrical holder 7 of the burner plate 1, which is coaxial with the mixture guide 3, is separated by insulation 23 from a cylindrical wall 26 which encloses the combustion chamber 24 and is located within a device housing 25.
  • the radial recesses 5 of the mouth area of the mixture guide 3 are assigned within the mixture chamber 6 a conically shaped, downwardly tapering, axially adjustable distributor plate 27 with an obliquely upwardly extending guide surface in order to distribute the mixture emerging from the recesses 5 to the mixture outlet openings 2 of the burner plate 1 as evenly as possible feed.
  • the end plate 10 of the mixture chamber 6 forms part of the housing cover, which rests with the seals 41 on the edge of the device housing 25.
  • the gas nozzle 18 is held within the air duct 15 by an end of the gas supply line 17 protruding laterally into this air duct 15 in a seal 28 accommodated therein and can be simply, namely screwless, into this seal 28 , be plugged in.
  • the gas nozzle 18 At its end facing the blower 16, the gas nozzle 18 is centered in a central recess 30 of the holder 19 by means of a pin 29 and at the end facing the mixture guide 3 it is closed by a threaded piece and held by the spring clip 31, the ends of which are shown in FIG. 6 a pipe socket 33, which surrounds the gas nozzle 18 at a distance, can be anchored in mutually opposite recesses 32.
  • the gas emerges from radial nozzle bores 34, which are arranged within the pipe socket 33 and ensure intensive mixing of the gas with the air flowing rapidly therethrough.
  • the centering pin 29 can be designed and screwed as a threaded pin, specifically it can be screwed inside the hollow gas nozzle 18 (FIG. 7 ) or on the free end face (Fig. 8), whereby in the latter case it can also serve to fix the spring clip 31, which can be accommodated in the screw groove of the screw head.
  • Fig. 9 illustrates more clearly the removability of the part located on the right of the butt joint 20 of the air duct 15, which also includes the mixture duct 3 and the burner head attached to it, from the fixed part on the left of the butt joint 20, containing the gas nozzle 18 and connected to the blower 16 Part. 9 shows the setting of the axially movable ring diaphragm 11, which covers the recesses 5 of the mouth area of the mixture guide 3 to a greater or lesser extent if necessary (FIGS. 12, 13).
  • this ring diaphragm 11 is served by the already mentioned spindle 12, at the lower end of which a three-armed carrier 35 of the ring diaphragm 11 is detachably fastened, and the upper, threaded end of which is adjustably screwed into a threaded nut 13 and by means of a lock nut 14 in a desired position is fixable.
  • FIG. 9 also shows the fastening of the burner plate 1 in its holder 7 by means of a retaining ring 36 which is fastened to the lower end of the mixture guide 3 and presses the edge of the burner plate 1 against the inwardly directed edge flange 37 of the annular holder 7.
  • the upper, insulation-carrying end plate 10 of the mixture chamber 6 is firmly connected, the edge of which rests sealingly on the edge of the annular holder 7 via a seal 38 and is held by claws 39 according to FIG the housing cover 40 are attached.
  • This housing cover 40 on which the holder 7 also rests with its edge via a seal 41, contains insulating material and - according to FIG. 14 - is penetrated by the insulating jacket 43 of an ignition electrode 42, the connection of which protrudes upwards from the housing cover 40 and the lower end thereof is located below the burner plate 1.
  • This ignition electrode can be inserted from below and is held by a spring 44 which engages in a recess 45 in the casing 43 and is fastened to a shoulder 46 of the housing cover 40 by means of a screw.
  • the holder 7 of the burner plate 1 illustrates another embodiment of the holder 7 of the burner plate 1, namely the holder 7 comprises a mixture guide ring 47 which delimits a peripheral annular space 48 in the holder 7.
  • the holder 7 receives a stationary ring 49, which is welded to the inside of the annular holder 7 and is gripped by its inward-facing edge flange 37.
  • the rotatable clamping ring 50 can be anchored to this stationary ring 49, specifically this stationary ring 49 according to FIG. 19 has upwardly open but undercut recesses 51, into which outward radial extensions 52 of the clamping ring 50 engage.
  • the clamping ring 50 is resiliently elastic, namely approximately V-shaped, profiled and presses with its lower edge 53 against the edge of the burner plate 1.
  • this burner plate 1 is offset and protrudes with the plane of its underside (outside) relative to an edge flange 37 of the holder 7, the heat effect of the burner flames on the holder 7 is comparatively low.
  • the clamping force of the clamping ring 50 can be transmitted to the edge of the burner plate 1 in any desired constructive manner.
  • curved tongues 54 spaced apart from one another can be provided or knobs 55 bulged out of a continuous edge according to FIG. 17.
  • the lower edge of the clamping ring 50 can also be designed to be smooth (flat) if the extensions 52 are given an inclined contact surface 57 which increases in the clamping direction indicated by the arrow 56.
  • the clamping ring 50 is formed between its radially outwardly projecting projections 52 with upright webs 58 which, if necessary, can be bent so as to engage the fixing ring 50 in one of the recesses 51 of the stationary ring 49.
  • Fig. 21 shows a cross section through a gas burner, the burner plate 1 is clamped in its holder 7 with pretension.
  • this burner plate 1 is supported against the end wall 64 of the mixture guide 3 and a pin 65 is used for the perfect centering of the burner plate 1 on this end wall 64.
  • the pretensioning of the burner plate 1 can be adjusted by means of the screw bolts 61 and a screwable ring 63.
  • the left and right half of the drawing show two different variants of the design of the peripheral holder 7 of the burner plate 1 on the burner housing 25.
  • the edge of the burner plate 1 is clamped in a sealing manner between a supporting flange 37 and an overlapping flange 62 of the holder 7.
  • the overlapping flange 62 of the holder 7 is formed by a ring 63 which can be screwed to the burner housing 25 by means of screw bolts 61.
  • the overlapping flange 62 of the holder 7 is fastened to the supporting flange 37 of the holder 7 fastened to the housing 25.
  • the supporting flange 37 could be designed as a leg of a Z or U profile fastened to the housing 25.
  • FIG. 22 shows a holder 7, which is embodied by a hollow profile 67 and includes a water-carrying cavity 68 and carries an inwardly directed ring flange 37 on which the burner plate 1 rests.
  • the insulating upper end plate 10 of the mixture chamber 6 rests in an annular, with a seal 38 equipped support 69 of the hollow profile 67 and can be pulled off from the holder together with the burner plate 1 and the mixture guide 3.
  • the hollow profile 67 forming the holder 7 can also be part of the housing 25 and its cavity 68 is used to recycle the heat absorbed by the coolant, preferably water, to the circulation system of a water heater, e.g. can be connected to the flow and return of a heating system.
  • the coolant preferably water
  • the cylindrical combustion chamber 24 of a gas burner according to the invention which is delimited at the bottom by a base, can be arranged within the housing of a water heater.
  • the bottom of the combustion chamber 24 can be formed by the top of a condensate heat exchanger, which may have a channel-shaped profile.
  • the outside (top) of the plate 10, which is traversed by the mixture guide 3 and adjoins the mixture chamber 6 at the top, and the area of the housing cover 40 which surrounds the holder 7 of the burner plate 1 are expediently filled with an insulating material, as shown in FIGS. 15 and 21 show.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Glass Compositions (AREA)
  • Gas Separation By Absorption (AREA)
EP87730086A 1986-07-28 1987-07-28 Brûleur à gaz Expired - Lifetime EP0255472B1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
AT2023/86 1986-07-28
AT202386A AT393018B (de) 1986-07-28 1986-07-28 Gasbrenner
DE19868631542 DE8631542U1 (de) 1986-11-25 1986-11-25 Gasbrenner, insbesondere Sturzbrenner
DE8631542U 1986-11-25
AT532/87 1987-03-06
AT53287A AT388793B (de) 1987-03-06 1987-03-06 Vorrichtung zum befestigen einer von brennstoff- austrittsoeffnungen durchsetzten brennerplatte eines flaechenbrenners
AT1889/87 1987-07-24
AT188987A AT391189B (de) 1987-07-24 1987-07-24 Gasbrenner, insbesondere sturzbrenner

Publications (3)

Publication Number Publication Date
EP0255472A2 true EP0255472A2 (fr) 1988-02-03
EP0255472A3 EP0255472A3 (en) 1989-01-25
EP0255472B1 EP0255472B1 (fr) 1991-02-13

Family

ID=27421257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730086A Expired - Lifetime EP0255472B1 (fr) 1986-07-28 1987-07-28 Brûleur à gaz

Country Status (4)

Country Link
EP (1) EP0255472B1 (fr)
AT (1) ATE60882T1 (fr)
DE (1) DE3768021D1 (fr)
ES (1) ES2021388B3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672664A1 (fr) * 1991-02-07 1992-08-14 Dietrich Thermique Bruleur compact en fonte du type a premelange total.
CN105402726A (zh) * 2015-12-29 2016-03-16 云南航天工业有限公司 一种燃气逆风喷射掺混燃气燃烧器

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2211107A5 (fr) * 1972-12-15 1974-07-12 Cepem
FR2292928A1 (fr) * 1974-11-29 1976-06-25 Int Magna Corp Appareil de chauffage par rayonnement infra-rouge
US4039275A (en) * 1976-02-23 1977-08-02 Mcgettrick Charles A Infrared energy generator with orifice plate
IT1141852B (it) * 1980-03-12 1986-10-08 Silvio Polidoro Bruciatore a gas,a raggi infrarossi rivolti verso il basso

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2672664A1 (fr) * 1991-02-07 1992-08-14 Dietrich Thermique Bruleur compact en fonte du type a premelange total.
EP0499557A1 (fr) * 1991-02-07 1992-08-19 De Dietrich Thermique Brûleur compact en fonte du type à prémélange total
CN105402726A (zh) * 2015-12-29 2016-03-16 云南航天工业有限公司 一种燃气逆风喷射掺混燃气燃烧器

Also Published As

Publication number Publication date
ES2021388B3 (es) 1991-11-01
ATE60882T1 (de) 1991-02-15
DE3768021D1 (de) 1991-03-21
EP0255472A3 (en) 1989-01-25
EP0255472B1 (fr) 1991-02-13

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